<!DOCTYPE html>
<html lang="zh-Hans">
  <head>
    <title></title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">

  </head>
  <body>
    <Button id="btn">打开新窗口</Button>
    <script src="renderder/demo2.js"></script>
  </body>
</html>